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    Active components like transistors, BJTs, MOSFETs,  and integrated circuits (ICs) make it possible to control circuits. This video explains the must-have NPN and PNP BJTs. For MOSFETs there are a couple of N-Channels and P-Channels to consider. Basic ICs include some digital logic stuff from the 7400-family as well as the venerable 555-timer to have on-hand. We did not forget Op-Amps either. Spoiler: We do not recommend the ua741!

     

    Supplemental Content:

     

     

    Bill of Materials

     

    Product NameManufacturerQuantityBuy KitBuy Kit
    LM358 - AudioTI1Buy NowBuy Now
    LM324 - General PurposeTI1Buy NowBuy Now
    TL074 - JFETTI1Buy NowBuy Now
    2n3904 - BJT NPNMulticomp1Buy NowBuy Now
    2n3906 - BJT PNPMulticomp1Buy NowBuy Now
    2n7000 - MOSFETOn-Semi1Buy NowBuy Now
    IRFZ44NPBFIRFZ44NPBF - N-Channel FETInternational Rectifier1Buy NowBuy Now
    IRF4905 - P-Channel FETInternational Rectifier1Buy NowBuy Now
    MC7805BTGMC7805BTG - 5 Volt Regulator (modern 7805)On-Semi1Buy NowBuy Now
    LM317BTGLM317BTG - Adjustable Positive RegulatorTI1Buy NowBuy Now
    LM337TGLM337TG - Adjustable Negative RegulatorTI1Buy NowBuy Now
    ICM7555IPAZICM7555IPAZ - CMOS 555Renesas1Buy NowBuy Now
    SN74HCT245NSN74HCT245N - Bidirectional Octal BufferTI1Buy NowBuy Now
    74HCT595 - Shift Register (SMD...)Nexperia1Buy NowBuy Now